Means for introducing materials between rollers



July 2, 1929. Anc. WEHNERT 1,719,035

MEANS FOR INTRODUCING MATERIALS BETWEEN ROLLERS Filed Sept. l5, 1927 rames July 2, .1929.

UNIT-Eo STATES.

PATENT orifice.

AUGST CURT WEHNEBT, F DRESDEN, GERMANY, .ASS-I'GNOR T0 THE FIB! UNIVER- SELLE CIGABETTENEASCHINENFABRIK'T. IC. MULLER & C0., 0F DRESDEN, GEE- HEANS FOB INTB/.ODUCING MATERIALS BETWEEN IROL'IJllRS.

,Application Bled September 15,1927, Serial No., 219,735, and inV Germany July 29, 1927.

In many cases'the problem arises'of-intro-y ducing such materials as cut tobacco, paperblanks, pasty masses or the like, the constituents of which, such `as fibres or" the like, o have a certain amount of loose cohesion, between feed rollers, which subject the mate'- rial to a further treatment; as forl example spiked rollers in the case of tobacco spreaders, or squeezing rollers in the case of pulps llo containing moisture, such as paper pulps or the like. When an endless band is employed for the feeding of materials, this' band, as

is known, must ,be passed over at least two guide rollers, the guide roller adjacent to the la pair of feed rollers then having to be placed as near as possible to the angle between the feed rollers. -Tlle farther the guide roller is shifted into the angle between the feed rollers the smaller must its diameter be, but the to smaller the diameter of the guide roller is, the more it is exposed to deflections, so that even in the case of strips of moderate breadth, which involve feed rollers of a corresponding breadth, the diameter of the guide roller,- cannot on -this ground be reduced below a comparatively large minimum dimansion'.- Hence the usual guide rollers cannot be advanced so far into the angle be`A tween the feed rollers as to enable a bridgey to be dispensed with for transferring the material leaving the endless band into the gap between the feed rollers.

Now the object of the presentinvention is to make this bridge unnecessary, so thatthe material can be delivered by the band completely into `the angle between the feed rollers, and given up to the feed rollers without tearing or dropping. For this purpose the guide roller in question is formed, in a i manner known in itself, from a plurality of hollow tubes of small diameter with boxedin lubricating packing, which is so .supported as to be freely rotatable upon a fined shaft, the shaft being supported between-the individual hollow tube elements by bearing eyes carried by the bearing body. Thus the device known in the art by the designation oilless bearing is utilized, with which the diameter can be so far reduced that the guide roller is shifted practically right up to the gap between the two feed rollers. The def flection of the guide roller shaft is revented by the bearing eyes supporting t e shaft between the separate tubular elements. The

tion, with its bearing.

- roller 3 t duces the tobacco fleece on the spiked roller bearing which now extends .stripwise overthe entire length of the shaft can be readily adapted to the small diameter of the guide roller.

l In-the accompanying drawings is illusl trated by way of example .a tobacco spreader for cigarette machines, wherein the band vformed in lthe tobacco spreader is to be fed to av pair of rollers, between which the tobacco band is rolled flat but is to be carried along by spikes on one of the rollers.`

In' these drawings Figure 1 is alongitudinal sectional elevation, and

Figures 2 and 3 show inside elevation and in plan respectively the guide roller in ques- The tobacco spreader consists of a container 1, in which is provided a circulating coni veyor band 2, which feeds the tobacco to a known spiked roller 3. Above the spiked ere is a scraper roller 4, which pro- 3. The tobacco fleece is then taken olf by a beater roller 5, so that the tobacco falls on to an endless band 6. 'lhe belt conveyor 6 is intended for feeding the tobacco to a further pin roller 7, above which a pressure roller 8 is arranged, which forces the tobacco into the gaps between the pins on the pin roller 7. Round the pin rolleris placed -a concentric cover surface 9, b which the tobacco fleece situated upon t e pin roller 7 is held until it arrives within reach ofthe pins on a further removing or stripper roller 10, which scrapes the tobacco od' the pin roller 7, whereupon the tobacco dro s on to a conveyor belt 11. The conveyor lt 11 delivers. the tobacco to the cigarette machine.

The conveyor belt 6 passes at one end over a guide roller 12 and at the other end over a guideroller 13.

In order to enable the guide roller 13 to be introduced as far as'possible into the angle between the two rollers 8 and 9, the said roller 13 has been given a very small diameter in comparison with the guide roller eating packing.- The hollow tubular elements 14 are rotatablymounted uponafxed shaft (ing 18, and support the shaft 'at a numberI of points. In this way it is possible to give the shaft 15 an extremely small diameter without danger of undue bending, so that this shaft, with the tubular elements 14 slipped on to it, can beintroduced right into the angle between the two rollers 8 and 9. The arrangin of special lubricating appliances for the tu ular elements 14 here serving as guide rollers for the conveyor belt 6 is unnecessary, because these tubular elements are constructed ina known manner as oil-less bearings.

What I claim is 1. The combination, with a pair of operatively coacting feed rollers, of a bearing body arranged so as' to roject into the angle bep tween the feed ro ers, bearing eyes on the portion of said bearing body projecting into said angle, a fixed shaft sup orted in sa'd arin e es, a plurality of tu ular elemen s ofv sma l iameter rotatably mounted on sai fixed shaft between said e es and a conveyor band passed over said tubular elements for introducing materials, of the kind described between sald feed rollers.

2. The combination, with a pair of o eratively coacting feed rollers, of a bearing dy arranged so as to roject into the angle be` tween the feed ro ers, bearing eyes on the portion of said bearing body projecting into said angle, a fixed shaft supported in said bearing eyes, a plurality o`f self-lubricating tubular elements of small diameter having lubricant retaining means enclosed in their interiors rotatabl mounted on said fixed shaft between saidy eyes and a conve or band passed over said tubular elements or introducing materials of the kind described between said feed rollers.

In testimony whereof I have signed my .name to this s ecification. i

AU UST CURT WEHNERT. 

